Originally Posted by crazy4diesel

I'm dumping the SLS, between 2 cars, there were not enough working components to make it work. On top of that were the $6,000 in receipts the PO had for the SLS system over the last 15 years to keep it going (which had failed again by the time I bought the car) I actually think it was their primary motive to sell the car.

To me it's a very cool idea, when it works, but it's just too trouble prone and messy, and expensive to keep it working.

The 13 or the 18 MM seem to be the way to? Does the extra thickness also help isolate road harshness transfer to the cabin?